ipc: fix to protect IPCS lookups using RCU
In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().
CVE-2025-38212
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38212
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "5f1e1573bf103303944fd7225559de5d8297539c",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "b968ba8bfd9f90914957bbbd815413bf6a98eca7",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "74bc813d11c30e28fc5261dc877cca662ccfac68",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "78297d53d3878d43c1d627d20cd09f611fa4b91d",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "5180561afff8e0f029073c8c8117c95c6512d1f9",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "68c173ea138b66d7dd1fd980c9bc578a18e11884",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "b0b6bf90ce2699a574b3683e22c44d0dcdd7a057",
"versionType": "git"
},
{
"status": "affected",
"version": "b34a6b1da371ed8af1221459a18c67970f7e3d53",
"lessThan": "d66adabe91803ef34a8b90613c81267b5ded1472",
"versionType": "git"
}
],
"programFiles": [
"ipc/shm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.295",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.239",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.186",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.95",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.35",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.4",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"ipc/shm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38212
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30542 · Revision 1
- Added to Heist Feed
- Publisher date